An ultra-thin highly flexible microfluidic device for blood oxygenation

Area of Science:

• Biomedical Engineering
• Neonatal Medicine
• Microfluidics

Background:

• Premature neonates often require mechanical ventilation or ECMO for respiratory distress syndrome (RDS).
• These invasive methods carry risks of bronchopulmonary dysplasia and require surgical vascular access.
• An artificial placenta offers a biomimetic, less invasive alternative using umbilical cord access.

Purpose of the Study:

• To develop a novel artificial placenta-type microfluidic blood oxygenator (APMBO).
• To create a device with high gas exchange, low priming volume, and low hydraulic resistance.
• To design a flexible, foldable device operable by the neonate's own heart.

Main Methods:

• Development of an ultra-thin and flexible microfluidic blood oxygenator.
• Mimicking placental structure and function for biomimicry.
• Designing the device for passive operation driven by the neonate's cardiac pressure.

Main Results:

• The APMBO demonstrated high gas exchange capabilities.
• Achieved a sub-milliliter priming volume through foldable design and optimized connectors.
• Exhibited low hydraulic resistance, enabling operation by the neonate's heart.
• Sufficient oxygen uptake for preterm neonates around 0.5 kg birth-weight.

Conclusions:

• The developed APMBO is a promising, less invasive alternative to conventional respiratory support for premature infants.
• Its biomimetic design and passive operation minimize complications associated with current treatments.
• The device's compact, foldable nature and low priming volume enhance its clinical applicability.